[clang-repl] Remove redundant link libraries and drop unused file.

Many thanks to @Thakis for pointing this out.

That commit should have been a part of https://reviews.llvm.org/D107049

Author: vgvassilev

clang/examples/clang-interpreter/main.cpp

@@ -1,8 +1,5 @@
 set(LLVM_LINK_COMPONENTS
-  ${LLVM_TARGETS_TO_BUILD}
   Core
-  OrcJIT
-  Support
   )
 
 add_clang_unittest(ClangReplInterpreterTests